Average annual temperature is 19.2 °C
Absolute maximum temperature: 27.9 °C
Absolute minimum temperature: 9.5 °C
Number of sunny days: 39 days
Number of rainy days: 326 days
Look at detailed online map of Selwakanda
* Weather data for Selwakanda Sri Lanka is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 20.3 | 21.6 | 23.6 | 24.5 | 26.5 | 26.5 | 27.9 | 27.7 | 25.0 | 23.8 | 23.6 | 23.8 |
| Average daytime temperature (°C) | 19.0 | 20.0 | 21.4 | 23.0 | 24.1 | 25.5 | 24.8 | 26.1 | 23.7 | 22.3 | 21.8 | 20.9 |
| Average temperature (°C) | 16.2 | 17.1 | 18.1 | 19.3 | 20.2 | 21.1 | 20.5 | 21.0 | 20.0 | 19.1 | 18.8 | 18.4 |
| Average night temperature (°C) | 13.0 | 13.9 | 14.7 | 15.7 | 16.7 | 17.6 | 17.1 | 16.6 | 17.2 | 16.5 | 16.1 | 16.3 |
| Absolute minimum temperature (°C) | 9.5 | 11.5 | 13.2 | 14.1 | 14.8 | 16.3 | 14.8 | 14.7 | 15.6 | 15.1 | 13.9 | 13.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.8 | 11.9 | 12.1 | 12.3 | 12.4 | 12.5 | 12.5 | 12.3 | 12.2 | 12.0 | 11.8 | 11.7 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 8.8 | 8.7 | 9.1 | 10.0 | 9.1 | 10.4 | 9.3 | 10.5 | 7.9 | 7.2 | 7.3 | 6.5 |
| Precipitation (mm) | 168 | 130 | 146 | 121 | 154 | 29 | 97 | 152 | 198 | 517 | 453 | 396 |
| Sunny days | 4 | 5 | 4 | 4 | 5 | 3 | 7 | 4 | 0 | 2 | 0 | 1 |
| Rainy days | 27 | 23 | 27 | 26 | 26 | 27 | 24 | 27 | 30 | 29 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Selwakanda is at